MYDRIASIS

mydriasis

(noun) reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs

Source: WordNet® 3.1

Etymology

Noun

mydriasis (plural mydriases)

(medicine) The condition of having abnormally large and dilated pupils due to disease or drugs, particularly stimulants such as (meth)amphetamines, cocaine, etc.

Antonyms

• miosis

Source: Wiktionary

My*dri"a*sis, n. Etym: [L., fr. Gr. (Physiol. & Med.)

Definition: A long-continued or excessive dilatation of the pupil of the eye.

Source: Webster’s Unabridged Dictionary 1913 Edition

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